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Round off each of the following numbers to three significant digits. a. 0.00042557 c

Introductory Chemistry: A Foundation | 7th Edition | ISBN: 9781439049402 | Authors: Steven S. Zumdahl, Donald J. DeCoste ISBN: 9781439049402 426

Solution for problem 136 Chapter 2

Introductory Chemistry: A Foundation | 7th Edition

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Introductory Chemistry: A Foundation | 7th Edition | ISBN: 9781439049402 | Authors: Steven S. Zumdahl, Donald J. DeCoste

Introductory Chemistry: A Foundation | 7th Edition

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Problem 136

Round off each of the following numbers to three significant digits. a. 0.00042557 c. 5,991,556 b. 4.0235 _ 10_5 d. 399.85 e. 0.0059998

Step-by-Step Solution:
Step 1 of 3

Molecular Mas and Formula Mass  Molecular mass o Sum of atomic masses of ions in a molecular formula  Unit= amu  Formula mass o Sum of atomic masses of ions in a formula unit Conversion:  Always go to moles and then convert to desired unit Chemical reaction  Bonds are broken and new ones form  Properties of new substance are different from starting material  Chemical reactions follow the low of conservation of mass o Cant me created or destroyed  Will occur if: o The collision occurs with sufficient energy o Substances collide in proper orientation resulting in the breaking and making new bonds Chemical equation:  Left side: reactants  Right side: products  Coeffic

Step 2 of 3

Chapter 2, Problem 136 is Solved
Step 3 of 3

Textbook: Introductory Chemistry: A Foundation
Edition: 7
Author: Steven S. Zumdahl, Donald J. DeCoste
ISBN: 9781439049402

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Round off each of the following numbers to three significant digits. a. 0.00042557 c